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20292800T10Z001K000
JUMO tecLine CR S01
Conductive 2-electrode conductivity sensor
Brief description
The JUMO tecLine CR S01 sensors acquire the electrolytic conductivity of a measuring liquid
according to the conductive 2-electrode measuring principle. A transmitter supplies the elec-
trodes with an alternating voltage. The current flowing through the measurement medium de-
pends on the medium's conductivity. An integrated temperature probe (either Pt100 or Pt1000)
simultaneously acquires the temperature of the measuring liquid.
The sensors are available in two design types, which differ in terms of their geometry and the cell
constant K. The version with K = 1.0 covers a wide measuring range of 1.0 to 5000 µS/cm (5 mS/
cm). The version with K = 0.1 can be used in a range of 0.1 to 1000 µS/cm. The electrodes of
these sensors are made from stainless steel 1.4404 and are set in a PEEK (polyether ether ke-
tone) body, which offers a high level of chemical resistance. Another feature of these sensors is
their resistance to heat and cold, with an area of application between -40 and +100 °C.
The sensor housing is based on a cable fitting according to DIN EN 62444 and ensures that the
sensor has a compact size. As a result, the sensor can also be installed in hard-to-reach areas.
With immersion lengths between 22.5 and 44.5 mm, the sensors can also be installed in pipes
with small nominal widths.
Process connections featuring a globally standardized metric thread (M20 × 1.5) or standardized
self-sealing NPT thread (1/2") ensure that the sensor can be mounted easily and reliably.
Application
The sensor is suitable for universal use, for example:
• Drinking water, service water, and wastewater applications
• Refrigeration, air-conditioning, and cooling system construction
• Reverse osmosis plants
• Industrial rinsing processes involving a low level of pollutants
• Horticultural technology
• Industrial water applications
• Chemical industry
• Food and beverage industry
It is possible to select different materials for the process connection, such as nickel-plated brass
or corrosion-resistant stainless steel, meaning the user can select the ideal sensor for their par-
ticular application.
The "Sensor selection guide" table on the next page is intended to help users make their selec-
tion.
Type 202928/10-0010-...
Special features
• Robust, compact process sensor, also
suitable for small nominal pipe widths
• Wide measuring range
(0.1 to 5000 µS/cm)
• Resistant to heat and cold at tempera-
tures between
-40 and +100 °C
• Simple installation
• Protection type IP68
• Provides good chemical resistance to
aggressive media
• Easy to clean
V1.00/EN/00722167/2020-03-09
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Sensor selection guide
The information in this table has been compiled from relevant references and guidelines. The table is intended as an overview to make it easier
for the user to select their sensor. The table is not exhaustive. The user must verify the suitability of the sensors themselves.
Process connection
material
Resistance Common applications Notes on suitability
Brass, nickel-plated Resistant to
• Aqueous and alkaline solutions
• Non-oxidizing acids (e.g. hydro-
chloric acid)
• Neutral salt solutions
• Organic substances
Not resistant to
• Oxidant
• Oxidizing acids
• Ammonia compounds
• Hydrogen sulfide
•Seawater
• Drinking water
• Service water
• Refrigeration, air-conditioning,
and cooling systems
• General water and wastewater
applications
Not suitable for
• Swimming pools
• Seawater und brackish water
• Soft water with a high chloride
content
Stainless steel 1.4404 Resistant to
• Organic and inorganic acids
• Solutions with moderate chlo-
rine
a
and salt concentrations
Not resistant to
• Solutions with a high hydrogen
sulfide content
• Drinking water
• Service water
• General water and wastewater
applications
• Sewage treatment plants
• Industrial water
• Swimming pools
• Chemical industry
• Apparatus engineering
• Paper industry
• Automotive industry
• Food industry
• Beverage industry, breweries
•Dairies
Suitable for
• Salt solutions
b
Not suitable for
• Hygienic applications
•Seawater
b
a
Limited resistance to chlorine (up to 4 mg/l).
b
Due to the material that the electrode is made from (stainless steel 1.4404), the content of chloride ions must not exceed 1000 mg/l in cold water
and 500 mg/l in heated indoor and open-air swimming pools.